N-cyclopropyl amides of 4-phenyl-1,2,5,6-tetrahydropyridino alkanoic acids and intermediates thereof



United States Patent N-CYCLOPROPYL AMIDES 0F 4-PHENYL-1,2,5,6-

TETRAHYDROPYRIDINO ALKANOIC ACIDS AND INTERMEDIATES THEREOF John H. Biel and Harvey B. Hopps, Milwaukee, Wis., assignors to Aldrich Chemical Company, Inc., Milwaukee, Wis., a corporation of Wisconsin No Drawing. Filed Apr. 7, 1964, Ser. No. 358,101

14 Claims. (Cl. 260295) This invention relates to novel 4-arylpyridines. More particularly, this invention relates to N-cyclopropyl amides of 4 phenyl 1,2,5,6 tetrahydropyridin'oalkanoic acids and a process for the preparation thereof. In a further aspect, this invention relates to novel intermediates useful in processes for preparing the novel 4-arylpyridines of this invention.

In accordance with the present invention, there is provided a member selected from the group consisting of 4- arylpyridines of the formula (II) R3 and (III) R R wherein:

n is a whole integer from 0 to 6 inclusive, and

R and R are each a member selected from the group consisting of hydrogen, chloro, bromo, iodo, fluoro, trifluoromethyl, amino, nitro, (lower)alkyl, (lower) ralkoxy, hydroxy, phenyl, phenoxy, benzyl, (lower) alkylamino, di(lower) alkylamino, (lower) alk-anoylamino, (lower) alkylthio, sulfamyl, (lower)alkanoyl, (lower)alkylsulfonyl, methylenedioxy, cycloalkyl radicals having from to 7 carbon atoms inclusive and Cit cycloalkoxy radicals having from 5 to 7 carbon atoms inclusive;

and the pharmaceutically acceptable nontoxic salts thereof.

Among the radicals represented by R R R and R hydrogen, chloro, bromo, iodo, fluoro, trifluoromethyl, nitro, (lower)alkyl, (lower)alkoxy, (lower)alkylthio, (lower)alkanoyl, phenyl, phenoxy and benzyl are preferred. Preferably R or R and R or R are hydrogen and usually R R R and R are all hydrogen.

The pharmaceutically acceptable nontoxic salts include the organic and inorganic acid addition salts, e.g., those prepared from acids such as hydrochloric, sulfuric, sulfamic, tartaric, fumaric, hydrobromic, hydroiodic, glycolic, citric, maleic, phosphoric, succinic, acetic and the like.

The term (lower)alkyl as used herein means both straight and branched chain aliphatic hydrocarbon radicals having from 1 to 8 carbon atoms such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, amyl, hexyl, 2-ethylhexyl, etc.

Similarly, where the term (lower) is used as part of the description of another group, e.g., (lower)alkoxy, it refers to the alkyl portion of such group which is therefore as described in connection with (lower) alkyl.

The meaning of the term (lower) alkylene is similar to that of (lower)alkyl in that it also means both straight and branched chain aliphatic hydrocarbon radicals having from 1 to 8 carbon atoms. Examples of (lower)alkylene radicals are methylene, ethylene, propylene, isopropylene, butylene, isobutylene, t-butylene, amylene, hexylene, 2-ethylhexylene and the like.

The compounds of this invention are valuable pharmaceutical agents' They produce pain relief and reduce blood pressure, which makes the compounds useful as analegesic agents and antihypertensive agents. In addition, the compounds, being tertiary bases, can be used to recover and purify penicillin with which they form salts.

The 4-arylpyridines of the present invention were tested for analgesic activity by the phenylquinone test of Sigmund et aL, Proc. Soc. Exptl. Biol. and Med., 95, 729 (1957) in which an analgesic reduces the induced writhing of the mice. The compounds were administered at dosages of 39 mgm./kg. p. 0. in mice, 50 minutes before the phenyl-p-quinone was injected. The reduction in induced writhing was determined at the end of the first hour. When, for example, N-(Z-phenylcyclopropyD-B- (4-phenyl-l,2,5,6-tetrahydropyridino)-propionamide was tested, the reduction in induced writhing at the end of the first hour was found to be 17% for the compounds. This indicated that N-(Z-phenylcyclopropyl)-;8-(4,phenyl-1, 2, 5, 6-tetrahydropyridino)propionamide is an analgesic agent.

The compounds of the present invention are prepared by the following series of steps:

(1) A cyclopropylamine of the formula molar quantity of a halo or tosylacid chloride of the formula 1 wherein A is a radical selected from the group consisting of chloro, bromo, iodo or tosyl, and Y is as represented above, according to the method described in U.S. Patent No. 2,569,288,

wherein A, Y and Z are as previously defined. The product, an N-cyclopropyl haloor tosylalkanoic acid amide, is a novel intermediate, useful in the second step of the method for the preparation of the 4-arylpyridines of Formula I, and is considered within the scope of this invention.

(2) The N-cyclopropyl haloor tosylalkanoic acid amide prepared in step 1 is then reacted with an equimolar quantity of a l,2,5,6-tetrahydropyridine of the formula wherein R and R are as described above, in the presence of triethylamine and dimethylformamide, and a trace of potassium iodide at elevated temperature, i.e., 65-70 C., for several hours according to the procedure described in U.S. Patent No. 2,929,818. The cooled reaction mixture is then poured into water containing an equimolar amount of sodium hydroxide. The free base is collected by filtration and dried.

wherein A, R R Y and Z are as defined above.

The free base may be readily converted, if desired, to a nontoxic acid addition salt by conventional procedures. An alternate procedure for preparing the compounds of the invention comprises the addition of the 1, 2,5 ,6- tetrahydropyridine to an acrylic acid ami e or a sub-- stituted acid amide in the presence of a strong base, e.g., sodium hydroxide, according to the equation Ba at wherein R R and Z are as represented above, and R and R are each hydrogen or (lower)alkyl.

A third procedure by which the compounds can be prepared involves the reaction of a haloor tosylalkanoic acid ester with the 1,2,5,6-tetrahydropyridine and subsequent conversion to the amide R R R wherein A, R R Y and Z are as described above and R is methyl, ethyl, p-nitrophenyl, cyanomethyl, succinimido, phthalimido, and OR may also be chloro or bromo.

In each of the three methods for the preparation of the compounds of this invention, the 1,2,5,6-tetrahydropyr'-' idine and other reactants are brought together in a suitable medium such as dimethylformamide, ethanol, isopropyl alcohol, toluene, xylene, dimethox'yethane, diethyleneglycol and heated at 50 1'0 ;0 C. for several hours in the presence of a base such as triethylamine, aminopyrine,

liaison diethylaniline, potassium carbonate, and triethyl-phenyl' ammonium hydroxide. The cooled reaction mixture isv then poured into dilute sodium hydroxide. The basic: amide or ester precipitates either as a Water insoluble oil. or a crystalline .solid and is extracted with such solvents. as methylene dichloride, chloroform, carbon tetrachlo-- ride or by filtration of the solid product. In the case of the third process, the ester that is obtained is reacted with cyclopropylarnine, or a substituted cyclopropylamine, the P dict i the n e ed e n nto i d dQ fiQn sa t- It is obvious that in some cases the radicals attached to the aromatic ring, e.g., the amino radical, will inter' fere with the reactions used in preparing the compounds of this invention. Therefore, it is necessary to block the reactive radicals before proceeding with the reactions. This is conveniently accomplished by methods known in the art. For example, in the case of an amino substituted aromatic ring, the amino group is blocked by forming the Schilfs base by reacting the aromatic amine with an aldehyde such as acetaldehyde, and after all reactions have been completed, the SchiflFs base may be cleaved with dilute hydrochloric acid to regenerate the free amino group.

The starting materials used in the processes described herein are compounds which are either commercially available, well known in the art, or easily prepared in accordance with standard organic procedures previously described in the chemical literature.

The compounds of this invention may be administered as the free bases or in the form of their nontoxic addition salts. They may be compounded and formulated into pharmaceutical preparations for oral or parenteral administration with organic or inorganic solid materials or liquids which are pharmaceutically acceptable carriers. The compositions may takethe form of tablets, powder granules, capsules, suspensions, solutions and the like. Such compositions are considered within the scope of this invention.

The following examples are intended to illustrate the invention described herein without unduly restricting it.

EXAMPLE 1 Preparation of N-2-phenylcyclopropyl-B-choropropionamide To a slurry of 2-phenylcyclopropylamine (6.7 g, 0.05 mole) and water (30 ml.), cooled by means of an ice Water bath to C., is added 3-chloropropionyl chloride (6.4 g., 0.05 mole) and a solution of sodium hydroxide (2 g., 0.05 mole) dissolved in water ml.). The rate of addition of the liquids is such as to keep the temperature below 15 C. and the pH near 8. Upon completion of the addition, the mixture is stirred briefly, and permitted to stand overnight. The resulting solid is collected when dry, and Weighs 6.25 g., M.P. 111-115 C. One recrystallization from benzene gives 5.5 g. of white solid, N-2-phenylcyclopropyl-fi-chloropropionamide, M.P.

Analysis.Calculated for C H ClNO: C, 64.42; H, 6.31; N, 6.26; Cl, 15.85. Found: C, 64.93; H, 6.28; N, 6.47; Cl, 15.61.

EXAMPLE 2 When, in the procedure of Example 1, the 2-phenylcyclopropylamine is replaced by an equal molar amount of cyclopropylamine,

Z-methylcy-clopropylamine, 2-ethylcyclopropylamine, 2-isopropylcyclopropylamine, 2-phenylcyclopropylamine, 2benzylcyclopropylamine, 2-1-naphthylcyclopropylarnine, 2-2-naphthylcyclopropylamine, 2-l-naphthylmethylcyclopropylamine, Z-pyridylcyclopropylamine, 2-3-thienylcyclopropylamine, 2-2-thienylcyclopropylamine, 2-4-chlorophenylcyclopropylamine, 2-4-trifluoromethylphenylcyclopropylamine, 2-4-methylphenylcyclopropylamine, 2-2-fluorophenylcyclopropylamine, 2-3-methylphenylcyclopropylamine, 2-3-brornophenylcyclopropylamine, 2-4-hydroxyphenylcyclopropylamine, 2-Z-methylaminophenylcyclopropylamine, 2-4-dimethylarninophenylcyclopropylamine,

2-2,6-dichlorophenylcyclopropylamine, 2-4-methylthiophenylcyclopropylamine, 2-2-sulfamylphenylcyclopropylamine, 2-4-cyclohexylphenylcyclopropylamine, 2-4-cyclohexyloxyphenylcyclopropylamine, 2-4-nitrophenylcyclopropylamine, 2-2-aminophenylcyclopropylamine, 2-2-iodo-4-methylphenylcyclopropylamine, 2-4-isopropylphenylcyclopropylamine, 2-4-phenylphenylcyclopropylamine, 2-3-phenoxyphenylcyclopropylamine, 2-4-benzylphenylcyclopropylamine, 2-3-acetamidophenylcyclopropylamine, 2-4-acetylphenylcyclopropylamine, 2-2-ethylsulfonylphenylcyclopropylamine, 2-3 ,4-methylenedioxyphenylcyclopropylamine, 2-4-fluorophenylcyclopropylamine, 2-4-c hlorobenzylphenylcyclopropylamine, 2-1-methyl-2-naphthylcyclopropylamine, 2-2-chloro-1-naphthylmethylcyclopropylamine, and 2-7-phenethylcyclopropylamine,

to produce cyclopropyl-,B-chloropropionamide, 2-methylcyclopropyl-fi-chloropropionamide, Z-ethylcyclopropyl-fl-chloropropionamidc, 2-isopropylcyclopropyl-fichloropropionamide, Z-phenylcyclopropyl-B-chloropropionamide, 2-benzylcyclopropyl-B-chloropropionamide, 2-1-naphthylcyclopropyl-,8-chloropropionamide, 2-Z-naphthylcyclopropyl-fl-c'hloropropionamide, 2-1-naphthylmety-hlcyclopropyl-fl-chloropropionamide, 2-pyridylcyclopropyl-,8chloropropionamide, 2-3-thienylcyclopropyl-fi-chloropropionamide, 2-2-thienylcyclopropyl-fi-chloropropionamide, 2-4-chlorophenylcyclopropyl-fl-chloropropionamide, 2 4 trifluoromethylphenylcyclopropyhB-chloropropionamide, 2-4-methylphenylcyclopropyl-B-chloropropionamide, 2-2-fluorophenylcy-clopropyl-fi-chloropropionamide, 2-3 methylphenylcyclopropyl-fl-chloropropionamide, 2-3-bromophenylcyclopropyl-B-chloropropionamide, 2-4-hydr0xyphenylcyclopropyl-B-chloropropionamide, 2 2 methylaminophenylcyclopropyl {3 chloropropionamide, 2 4 dimethylaminophenylcyclopropyl B chloropropionamide, 2-2,6-dichlorophenylcyclopropyl-B-chloropropionamide, 2-4-methylthiophenylcyclopropyl-fi-chloropropionamide, 2-2-sulfamylphenylcyclopropyl-B-chloropropionarnide, 2-4-cyclohexylphenylcyclopropyl-fi-chloropropionamide, I 2 4 cyclohexyloxyphenylcyclopropyl 5 chloropropionamide, 2-4-nitrophenylcyclopropyl-fi-chloropropionamide, 2-Z-aminophenylcyclopropyl-fi-chloropropionamide, 2 2 i0do-4-methylphenylcyclopropyl-p-chloropropionamide, 2-4-isopropylphenylcyclopropyl-fiwhloropropionamide, 2-4-phenylphenylcyclopropyl-B-chloropropionamide, 2-3-phenoxyphenylcyclopropyl-fi-chloropropionamide, 2-4-benzylphenylcyclopropyl-B-chloropropionamide, 2-3-acetamidophenylcyclopropyl-B-chloropropionamide, 2-4-acetylphenylcyclopropyl-fi-chloropropionamide, 2 2 ethylsulfonylphenylcyclopropyl 3-chloropropionamide, 2 3,4 methylenedioxyphenylcyclopropyl-p-chloropropionamide, 2-4-fluorophenylcyclopropyl-B-chloropropionamide, 2 4 chlorobenzylphenylcyclopropyl ,8 chloropropionamide, 2-l-methyl2-naphthylcyclopropyl-B-chloropropionamide, 2 2 chloro-1-naphthylmethylcyclopropyl-Bchloropropionamide, and 2-7-phenethylcyclopropyl-B-chloropropionamide,

respectively.

It is obvious that in some cases the radicals attached to the aromatic ring, e.g., the amino radical, will intertere with the reactions used in preparing the compounds of this invention. Therefore, it is necessary to block the reactive radicals before proceeding with the reactions. This is conveniently accomplished by methods known in the art. For example, in the case of an amino substituted aromatic ring, the amino group is blocked by forming the Schiffs base by reacting the aromatic amine with an aldehyde such as acetaldehyde, and after all reactions have been completed, the Schifls base may be cleaved with dilute hydrochloric acid to regenerate the free amino group.

The starting materials used in the processes described herein are compounds which are either commercially available, well known in the art, or easily prepared in accordance with standard organic procedures previously described in the chemical literature.

The compounds of this invention may be administered as the free bases or in the form of their nontoxic addition salts. They may be compounded and formulated into pharmaceutical preparations for oral or parenteral administration with organic or inorganic solid materials or liquids which are pharmaceutically acceptable carriers. The compositions may take the form of tablets, powder granules, capsules, suspensions, solutions and the like. Such compositions are considered within the scope of this invention.

The following examples are intended to illustrate the invention described herein without unduly restricting it.

EXAMPLE 1 Preparation of N -2-phenylcyclopropyl-fi-choropropionamide To a slurry of 2-phenylcyclopropylamine (6.7 g, 0.05

mole) and Water (30 ml.), cooled by means of an ice 'water bath to C., is added 3-chloropropionyl chloride (6.4 g., 0.05 mole) and a solution of sodium hydroxide (2 g., 0.05 mole) dissolved in water ml.). The rate of addition of the liquids is such as to keep the temperature below 15 C. and the pH near 8. Upon completion of the addition, the mixture is stirred briefly, and permitted to stand overnight. The resulting solid is collected when dry, and weighs 6.25 g., M.P. 111115 C. One recrystallization from benzene gives 5.5 :g. of white solid, N-2-phenylcyclopropyl-fl-chloropropionamide, M.P. 114-115 C.

Analysis.Calculated for C I-I ClNO: C, 64.42; H, 6.31; N, 6.26; CI, 15.85. Found: C, 64.93; H, 6.28; N, 6.47; Cl, 15.61.

EXAMPLE 2 When, in the procedure of Example 1, the 2-phenylcyclopropylamine is replaced by an equal molar amount of cyclopropylamine,

Z-methylcyclopropylamine, 2-ethylcyclopropylamine, 2-isopropylcyclopropylamine, 2-phenylcyclopropylamine, 2-benzylcyclopropylarnine, 2-1-naphthy1cyclopropylamine, 2-Z-naphthylcyclopropylamine, 2-1-napht-hylmethylcyclopropylamine, 2-pyridylcyclopropylamine, 2-3-thienylcyclopropylamine, 2-2-thienylcyclopropylamine, 2-4-chlorophenylcyclopropylamine, 2-4-trifiuoromethylphenylcyclopropylamine, 2-4-methylphenylcyclopropylamine, 2-2-fluorophenylcyclopropylamine, 2-3-methylphenylcyclopropylamine, 2-3-bromophenylcyclopropylamine, 2-4-hydroxyphenylcyclopropylamine, 2-2-methylaminophenylcyclopropylamine, 2-4-dimethyla minophenylcyclopropylamine,

6 2-2,6-dichlorophenylcyclopropylamine, 2-4-methylthiophenylcyclopropylamine, 2-2-sulfamylphenylcyclopropylamine, 2-4-cyclohexylphenylcyclopropylaminc, 2-4-cyclohexyloxyphenylcyclopropylamine, 2-4-nitrophenylcyclopropylamine, 2-2-aminophenylcyclopropylamine, 2-2-iode-4-methylphenylcyclopropylamine, 2-4-isopropylphenylcyclopropylamine, 2-4-phenylphenylcyclopropylamine, 2-'3-phenoxyphenylcyclopropylamine, 2-4-benzylphenylcyclopropylamine, 2-3-acetamidophenylcyclopropylamine, 2-4-acetylphenylcyclopropylamine, 2-2-ethylsulfonylphenylcyclopropylamine, 2-3,4-methylenedioxyphenylcyclopropylamine, 2-4-fiuorophenylcyclopropylamine, 2-4-chlorobenzylphenylcyclopropylamine, 2- l-methyl-2-naphthylcyclopropylamine, 2-2-chloro-1-naphthylmethylcyclopropylamine, and 2-7-phenethylcyclopropylamine,

to produce cyclopropyl-fi-chloropropionamide, 2-methylcyclopropyl-B-chloropropionamide, Z-ethylcyclopropyl-B-chloropropionarnide, 2-isopropylcyclopropyl-[3-chloropropionamide, 2-phenylcyclopropyl-B-chloropropionamide, 2-benzylcyclopropyl-fl-chloropropionamide, 2-1-naphthylcyclopropyl-fi-chloropropionamide, 2-2-naphthylcyclopropyl-B-chloropropionamide, 2-1-naphthylmetyhlcyclopropyl-fl-chloropropionamide, 2-pyridylcyclopropyl-fi-chloropropionamide, 2-3-thienylcyclopropyl-fl-chloropropionamide, 2-2-thienylcyclopropyl-fl-chloropropionamide, 2-4-c-hlorophenylcyclopropyl-fl-chloropropionamide, 2 4 trifluoromethylphenylcyclopropyl-fl-chloropropionamide, 2-4-methylphenylcyclopropyl-p-chloropropionamide, 2-2-fluorophenylcy-clopropyl-B-chloropropionamide, 2-3 nethylphenylcyclopropyl-fl-chloropropionamide, 2-3-bromophenylcyclopropyl-B-chloropropionamide, 2-4-hydroxyphenylcyclopropyl-B-chloropropionamide, 2 2 methylaminophenylcyclopropyl B chloropropionamide, 2 4 dimethylaminophenylcyclopropyl B chloropropionamide, 2-2,6-dichlorophenylcyclopropyl-fi-chloropropionamide, 2-4-methy1thiophenylcyclopropyl-fi-chloropropionamide, 2-2-sulfamylphenylcyclopropyl-B-chloropropionarnide, 2-4-cyclohexylphenylcyclopropyl-fi-chloropropionamide, 2 4 cyclohexyloxyphenylcyclopropyl B chloropropionamide, 2-4-nitrophenylcyclopropyl-fl-chloropropionamide, 2-2-aminophenylcyclopropyl-B-chloropropionamide, 2 2 iodo-4-methylphenylcyclopropyl-p-chloropropionamide, 2-4-isopropylphenylcyclopropy1-flchloropropionamide, 2-4-phenylphenylcyclopropyl-fi-chloropropionamide, 2-3-phenoxyphenylcyclopropyl-B-chloropropionamide, 2-4-benzylphenylcyclopropyl-fl-chloropropionamide, 2-3-acetamidophenylcyclopropyl-,B-chl0ropropionamide, 2-4-acetylphenylcyclopropyl-B-chloropropionamide, 2 2 ethylsulfonylphenylcyclopropylfl-chloropropionamide, 2 3,4 methylenedi0xyphenylcyclopropyl-18-chloropropionamide, 2-4-fluorophenylcyclopropyl- -chloropropionamide, 2 4 chlorobenzylphenylcyclopropyl ,8 chloropropionamide, 2-1-methyl-2-naphthylcyclopropyl-B-chloropropionamide, 2 2 chloro-1-naphthylmethylcyclopropyl-fi-chloropropionamide, and 2-7-phenethylcyclopropyl-p-chloropropionamide,

respectively.

9 EXAMPLE 7 When, in the procedure of Example 4, N-2-phenylcyclopropyl-B-chloropropionamide is replaced by an equal molar amount of each of the N-cyclopropyl-B- chloropropionamides prepared in Example 2, the following products are produced:

N cyclopropyl B (4-phenyl-1,2,5,6 tetrahydropyridino)propionamide,

N (2 methylcyclopropyl) B (4 phenyl 1,2,5,6

tetrahydropyridino)propionamide,

N (2 ethylcyclopropyl) B (4 phenyl 1,2,5,6

tetrahydropyridino)propionamide,

N (2 isopropylcyclopropyl) B (4 phenyl 1,2,5,6

tetrahydropyridino)propionamide,

N (2 phenylcyclopropyl) B (4 phenyl 1,2,5,6

tetrahydropyridino)propionamide,

N (2 benzylcyclopropyl) B (4 phenyl l,2,5,6

tetrahydropyridino)propionamide,

N (2 1 naphthylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 2 naphthylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 1 naphthylmethylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 pyridylcyclopropyl) B (4 phenyl 1,2,5,6

tetrahydropyridino)propionamide,

N (2 3 thienylcyclopropyl) B (4 phenyl 1,2,5,6

tetrahydropyridino)propionamide,

N (2 2 thienylcyclopropyl) B (4 phenyl 1,2,5,6

tetrahydropyridino)propionamide,

N (2 4 chlorophenylcyclopropyl) B -(4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 4 trifluoromethylphenylcyclopropyl) B (4 phenyl-1,2,5,6-tetrahydropyridino)propionamide,

N (2 4 methylphenylcyclopropyl) B (4 phenyl 1,2,5 ,6-tetrahydropyridino propionamide,

N (2 2 fiuorophenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 3 methylphenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 3 bromophenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 4 hydroxyphenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 2 methylaminophenylcyclopropyl) B (4- phenyl-1,2,5,6-tetrahydropyridino)propionamide,

N (2 4 dimethylaminophenylcyclopropyl) B (4 phenyl-1,2,5,6-tetrahydropyridino)propionamide,

N (2 2,6 dichlorophenylcyclopropyl) B (4 phenyl-1,2,5,6-tetrahydropyridino)propionamide,

N 2 4 methylthiophenylcyclopropyl) B (4 phenyl-1,2,5,6-tetrahydropyridino)propionamide,

N (2 2 sulfamylphenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 4 cyclohexylphenylcyclopropyl) B (4 phenyl-1,2,5,6-tetrahydropyridino)propionamide,

N (2 4 cyclohexyloxyphenylcyclopropyl) B -(4 phenyl-1,2,5,6-tetrahydropyridino )propionamide,

N (2 4 nitrophenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 2 aminophenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 2 iodo 4 methylphenylcyclopropyl) B (4 phenyl-1,2,5,6-tetrahydropyridino)propionamide,

N (2 4 isopropylphenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino )propionamide,

N (2 4 phenylphenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 3 phenoxyphenylcyclopropyl) B (4 phenyl 1,2,5 ,6-tetrahydropyridino )propionamide,

N (2 4 benzylphenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 3 acetamidophenylcyclopropyl) B (4 phenyl-1 ,2,5 ,G-tetrahydropyridino )propion amide,

N 2 4 acetylphenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 2 ethylsulfonylphenylcyclopropyl) B (4 phenyl-1,2,5,6-tetrahydropyridino)propionamide,

N (2 2,3-methylenedioxyphenylcyclopropyl) B (4 phenyl-1,2,5,6-tetrahydropyridino)propionamide,

N (2 4 fluorophenylcyclopropyl) B (4 phenyl 1,2,5,6-tetrahydropyridino)propionamide,

N (2 4 chlorobenzylphenylcyclopropyl) B (4 phenyl-1,2,5,6-tetrahydropyridino)propionamide,

N (2 1 methyl 2 naphthylcyclopropyl) B (4 phenyl-1,2,5,6-tetrahydropyridino)propionamide,

N (2 2 chloro 1 naphthylmethylcyclopropyl) B (4 phenyl 1,2,5,6 tetrahydropyridino)propion amide, and

N (2 phenethylcyclopropyl) B (4 phenyl 1,2,5,6-

tetrahydropyridino)propionamide,

respectively.

EXAMPLE 8 When, in the procedure of Example 4, N-Z-phenylcyclopropyl-B-chloropropionamide is replaced by an equal molar amount of each of the N-cyclopropyl-B chloro and tosyl alkylamides prepared in Example 3, the following products are produced:

N (2 phenylcyclopropyl) 4 phenyl 1,2,5,6-tetra hydropyridino) acetamide,

N (2 phenylcyclopropyl) a (4 phenyl 1,2,5,6

tetrahydropyridino)propionamide,

N (2 phenylcyclopropyl) 'y (4 phenyl 1,2,5,6

tetrahydropyrdino)butyramide,

N (2 phenylcyclopropyl) B (4 phenyl 1,2,5,6

tetrahydropyridino)propionamide,

N (2 phenylcyclopropyl) B (4 phenyl 1,2,5,6

tetrahydropyridino)propionamide,

N (2 phenylcyclopropyl) 'y (4 phenyl 1,2,5,6

tetrahydropyridino)hexanoamide,

N (2 -'phenylcyc1opropyl) B (4 phenyl 1,2,5,6

tetrahydropyridino)propionamide. What is claimed is: 1. A compound selected from the group consisting of compounds of the formula R and R are each a member selected from the group consisting of hydrogen, chloro, bromo, iodo, fluoro, trifluoromethyl, amino, nitro, (lower)alkyl, (lower)- alkoxy, hydroxy, phenyl, phenoxy, benzyl, (lower)- alkylamino, di(lower)alkylamino, (lower)alkanoylamino, (lower)alkylthio, sulfamyl, (lower)alkanoyl, (lower)alkylsulfonyl, methylenedioxy, cycloalkyl radicals having from 5 to 7 carbon atoms inclusive, and cycloalkoxy radicals having from 5 to 7 carbon atoms inclusive,

Y is a (lower) alkylene radical,

Z is a member selected from the group consisting of hydrogen, (lower)alkyl, pyr-idyl, thienyl and radicals of the formulae 1 1 and R v R4 N o l i-il-NHQ wherein R and R are each a member selected from the group consisting of hydrogen, chloro, bromo, iodo, fluoro, trifluoromethyl, amino, nitro, (lower) alkyl, (lower)- alkoxy, hydroxy, phenyl, phenoxy, benzyl, (lower)- alkylamino, di'(lower)alkylamino, (lower)alkanoylamino, (lower)alkylthio, sulfamyl, (lower)alkanoyl, (lower)alkylsulfonyl, methylenedioxy, cycloalkyl radicals having from 5 to 7 carbon atoms inclusive, and cycloalkoxy radicals having from 5 to 7 carbon atoms inclusive, and

Y is a (lower) alkylene radical;

and the pharmaceutically acceptable nontoxic salts thereof.

3. A compound selected from the group consisting of compounds of the formula wherein:

R R R and R are each a member selected from the group consisting of hydrogen, chloro, bromo, iodo, fiuoro, trifluoromethyl, amino, nitro, (lower)- alkyl, (lower) alkoxy, hydroxy, phenyl, phenoxy, benzyl, (lower) alkylamino, di(lower)alkylamino,

12 (lower)a1kanoylamino, (lower) alkylthio, sulfamyl, (lower) alkanoyl, (lower) alkylsulfonyl, methylenedioxy, cycloalkyl radicals having from 5 to 7 carbon atoms inclusive and cycloalkoxy radicals having from 5 to 7 carbon atoms inclusive, and Y is a (lower)alkylene radical; and the pharmaceutically acceptable nontoxic salts thereof.

4. A compound selected from the group consisting of compounds of the formula R and R are each a member selected from the group consisting of hydrogen, chloro, bromo, iodo, flu'oro, trifiuoromethyl, amino, nitro, (lower) alkyl, (lower)- alkoxy, hydroxy, phenyl, phenoxy, benzyl, (lower)- alkylamino, di(lower)a1kylamino, (lower)alkanoylamino, (lower)alkylthio, sulfamyl, (lower) alkanoyl, ('lower)alkylsulfonyl, methylenedioxy, cycloalkyl radicals having from 5 to 7 carbon atoms inclusive, and cycloalkoxy radicals having from 5 to 7 carbon atoms inclusive, and

Y is a (lower)alkylene radical;

and the pharmaceutically acceptable nontoxic salts thereof.

5. A compound selected from the group consisting of compounds of the formula wherein:

R and R are each a member selected from the group consisting of hydrogen, chloro, bromo, iodo, fluoro, trifluoromethyl, amino, nitro, (.lower)'alkyl, (lower)- alkoxy, hydroxy, phenyl, phenoxy, benzyl, (lower)- alkylamino, di-(lower)alkylamino, (lower) alkanoylamino, (lower) alkylthio, sulfamyl, (lower)'alkanoyl, (lower)a-lkylsulfonyl, methylenedioxy, cycloalkyl radicals having from 5 to 7 carbon atoms inclusive; and cycloalkoxy radicals having from 5 to 7 carbon atoms inclusive, and

Y is a (lower) alkylene radical;

and the pharamaceutically acceptable nontoxic salts thereof.

v 3,221,018 13 14 6. A compound selected from the group consisting 9. Acompound of the formula of compounds of the formula HQCHT' NH [O Y- -NH I (lower) alkyl I and the pharamaceutically acceptable nontoxic salts thereof. wherein: 10. A compound of the formula R and R are each a member selected from the group consisting of hydrogen, ch-loro, bromo, iodo, fiuoro, a trifluoromethyl, amino, nitro, (lower)a1kyl, (lower)- alkoxy, hydroxy, phenyl, phenoxy, benzyl, (lower)- alkylamino, di(loWer) alkylarnino, (lower)alkanoylradicals having from 5 to 7 carbon atoms inclusive; and cycloalkoxy radicals having from 5 to 7 carbon atoms inclusive, and V Y is a (lower)alkylene radical; and the pharamaceutically acceptable nontoxic salts amino, (lower)alkylthio, sulfarnyl, (lower)alkanoyl, (loWer)a-lky1sulfonyl, methylenedioxy, cycloalkyl p t '0 ll r N CHzCHz- NH thereof.

7. A compound selected from the group consisting 2 2 5 5 phar'maceuncany acceptable nontoxlc Salts of compounds of the formula 11 compound of the formula and the pharmaceutically acceptable nontoxic salts wherein: I th f Yisa (lower) alkylene radlcal; 1 A compound of the formula and the pharamaceutically acceptable nontoxic salts thereof.

8. A compound selected from the group consisting of compounds of the formula N 0 A ll HICHP NH thereof.

N 0 (QH CHg--QNHQ and the pharmaceutieally acceptable nontoxic salts 13. A compound of the formula and the pharmaceutically acceptable nontoxic salts thereof. 7 V

14. Compounds of the formula wherein:

A is a member selected from the group consisting of chloro, bromo, iodo and tos'yl, Y is a (1owe1")a1kylene? radical, and Z is a member selected from the group consisting of hydrogen, (lower) alkyl, pyridyl, thienyl and radicals of the formulae and ( HEM) 25 References Cited by the Examiner UNITED STATES PATENf 9/1 95; assell eta1. a..- 260*562 3/1 96 0 Janssen 1 260-295 1/1963 Bonvicino 260-240 WALTER A. MODANCE, Primary Examiner. 

1. A COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA 